– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Wed 11 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Wed 11 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Wed 11 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryModerate rain (total 17mm), heaviest on Wed night giving way to a moderate fall of snow, heaviest on Thu afternoon. Freeze-thaw conditions (max 6°C on Wed night, min -3°C on Fri night). Winds decreasing (fresh winds from the W on Wed night, calm by Fri morning). | Days 5–7 Weather SummaryA light covering of new snow mostly falling on Sun night. Becoming milder with moderate rain (total 12mm) heaviest on Sun night. Freeze-thaw conditions (max 8°C on Tue morning, min -4°C on Sat night). Wind will be generally light. | ||||||||||||||||
Wed 11 | Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  | |  |  |  |  | | | | |  | |  | |
mod. rain | mod. rain | light snow | light snow | mod. snow | light snow | cloudy | some clouds | snow shwrs | some clouds | some clouds | cloudy | light snow | mod. snow | light rain | light rain | rain shwrs | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | 2 | 3 | 8 | 1 | — | — | 1 | — | — | — | 1 | 6 | — | — | — | |
7 | 10 | — | — | — | — | — | — | — | — | — | — | — | 7 | 1.1 | 4 | 0.1 | |
max °C | 4 | 6 | 0 | 0 | -1 | 0 | 1 | 0 | -1 | 0 | -3 | 1 | 1 | 4 | 5 | 6 | 6 |
min °C | 2 | 0 | -1 | 0 | -1 | -2 | 1 | -3 | -2 | 0 | -4 | -2 | 1 | 1 | 4 | 5 | 6 |
-2 | -5 | -6 | -4 | -3 | -2 | 1 | -3 | -2 | -3 | -4 | -2 | -1 | -1 | 3 | 3 | 6 | |
1550 | 600 | 500 | 450 | 400 | 550 | 650 | 0 | 400 | 500 | 0 | 700 | 750 | 1500 | 2850 | 2700 | 2950 | |
Cloud base (m) | 550 | 600 | 600 | 600 | 600 | 600 | 550 | 600 | 600 | 700 | 800 | 2350 | 800 | 600 | 600 | 600 | 600 |
 | — | — | 7:28 | — | — | 7:26 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — |
 | 7:06 | — | — | 7:07 | — | — | 7:08 | — | — | 7:10 | — | — | 7:12 | — | — | 7:14 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Moderate rain (total 17mm), heaviest on Wed night giving way to a moderate fall of snow, heaviest on Thu afternoon. Freeze-thaw conditions (max 6°C on Wed night, min -3°C on Fri night). Winds decreasing (fresh winds from the W on Wed night, calm by Fri morning).
South Twin Sister Weather (Days 3-6):
A light covering of new snow mostly falling on Sun night. Becoming milder with moderate rain (total 12mm) heaviest on Sun night. Freeze-thaw conditions (max 8°C on Tue morning, min -4°C on Sat night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.